Heat pump self-breathing type drying device and drying control method thereof

Abstract

The embodiment of the invention discloses a heat pump self-breathing type drying device and a drying control method thereof. The heat pump self-breathing type drying device comprises a drying kiln, agas circulation system, a condensation drainage system, a heat supply system and a control system, the heat supply system comprises a heat pump machine, and a humidity adjusting medium in the drying kiln flows through the heat pump machine. The device has relatively high drying quality, the drying energy consumption can be effectively reduced, the recycling of heat energy is realized, and the treatment process is relatively safe and environment-friendly.

Description

technical field [0001] The present application relates to the technical field of drying equipment, in particular to a heat pump self-breathing drying device, and also to a drying control method for the drying device. Background technique [0002] Traditionally, in the drying or water balance treatment of wood, fruit, crops (such as peanuts, etc.), in order to make the humidity of the humidity control medium (such as humid air) in the drying kiln reach the set value of the drying reference or balance reference, spraying is often used. Steaming is used to increase the humidity of the humidity-conditioning medium (such as humid air) in the drying kiln. However, the spray steam method will increase the water vapor partial pressure of the humidity-conditioning medium, thereby slowing down the drying speed. [0003] At the same time, as the drying or moisture balance treatment proceeds, the treated material is heated, and the water on its surface evaporates and enters the humidit...

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Problems solved by technology

[0004] (1) The discharge of the hot and humid medium is not easy to control, and when the hot and humid medium is discharged and the fresh air is introduced, the temperature and humidity of the humidity control medium will decrease, making the real-time temperature and humidity in the drying kiln lower than the drying reference or balance reference The setting value of the humidity control medium will cause fluctuations in the temperature and humidity of the humidity control medium, which will affect the drying or balance quality;

[0005] (2) After the fresh air is introduced, it is necessary to reheat the fresh air, which increases energy consumption; on the other hand, the hot and humid medium with heat is directly discharged without recycling, which wastes energy;

[0006] (3) The hot and humid medium discharged from the drying kiln often carries polluting gases such as VOC, causing pollution to the environment

However, the above-mentioned technical solution only solves the recovery and utilization of waste heat, and its control of high-humidity environment still adopts the method of removing moisture and introducing fresh air. Relatively large consumption, VOC and other polluting gas emissions

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